Apparatus for testing the volume of air from the lungs.



No. 7u|,|s0. Patented, May 27, 1902; M. BENEDICT.

APPARATUS FOR TESTING THE VOLUME OF AIR FROM THE LUNGS.

(Applicaticn filed July 23, 1901.) C N o M 0 d e I.)

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I 2 MicHAEL BENEMW,

No. 70l,l30. Patented May 27, I902. M. BENEDICT. APPARATUS FOR TESTINGTHE VOLUME OF AIR FROM THE LUNGS.

(Application filed July 23. 1901.) (No Model.) 7 Sheets-Sheet 2.

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M. BENEDICT. APPARATUS FOR TESTING THE VOLUME OF AIR FROM THE LUNGS.

(Application filed July 23. 1901.)

(-No Model.)

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M. BENEDICT.

APPARATUS FUR TESTING THE VOLUME OF AIR FROM THE LUNGS.

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' No. 701,130. Patented May 27, H902. m. BENEDICT.

APPARATUS FOR TESTING THE VOLUME OF AIR FROM THE LUNGS.

(Application filed. July 23. 1901.)

7 sheetssheet (No Model.)

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Na. 70|,|30. Patented May 27, I902. M. BENEDICT.

APPARATUS FOR TES'HNG THE VOLUME OF AIR FROM THE LUNGS.

(Application filed July 23. 1901.)

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Nifii-IAEI. BENEDICT,

M. BENEDICT.

APPARATUS FOR TESTING THE VOLUME OF AIR FROM THE LUNGS.

(Application filed July 23, 1901.)

Pa tented May 27, I902.

(No Model.) 7 Sheets$heet 7.

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UNrrE S ATES MICHAEL BENEDICT,

PATENT @FMCE.

OF NEYV YORK, N. Y.

APPARATUS FOR TESTING THE VOLUME OF AIR FROM THE LUNGS.

SPECIFICATION forming part of Letters Patent 0. 701,130, dated May 27,1902.

Application filed July 23, 1901.

To all whom it may concern:

Be it known that I, MICHAEL BENEDICT, a citizen of the United States,residing at New York, in the countyof New York and State of New York,have invented'certaiu'new and use ful Improvements in Apparatus forTesting the Volume of theAir Blown from the Lungs; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

The present invention has reference more particularly to a novelconstruction of machine or apparatus of the character hereinafter morefully set forth which is intended for accurately registering thelung-power of a person.

The arrangement of the parts and operations of the mechanism of themachine, which is preferably used with coin-controlled apparatus, aresuch that after a person has deposited a coin in the coin-chute of theapparatus certain mechanism is released that it can be actuated by theair-from the lungs of a person blowing into an air-conducting tubeconnected with the apparatus, the said mechanism being arranged andoperating in such a manner that to all appearances one or more lightedgas-flames are extinguished by reducing the flame or flames and causingsuch reduced flame or flames to burn within a tubular casing arrangedabout each gas-jet, and hence out of sight of the person blowing, all ofwhich will be hereinafter more particularly set forth.

The principal object of this invention therefore is to provide anefficient and operative device to be used as a lung-tester which shallbe of a simple'and inexpensive construction.

A further object of this invention is to provide an apparatus of thecharacter above specified inwhich the several gas-jets which have beenreduced by a person blowing into the machine shall immediately andautomatically obtain their original size and burn brightly at the top ofthe jet as soon as the person ceases the blowing operation.

The invention therefore consists in the bellows.

Serial No. 69,3497. (No model.)

novel construction of lung-testing apparatus to be hereinafter fullydescribed, and, furthermore, the novelty of my invention resides in theconstruction, combinations, and arrangements of the devices disclosed,all of which will beset forth in the following specification and thenfinally embodied in the clauses of the claim, which form a part of thesaid specification.

The invention is clearly illustrated in the accompanying drawings, inwhich- Figure I is a front view of an apparatus in which is embodied thevarious features of my present invention, and Fig. 2 is a top or planview of the same. Fig. 3 is a horizontal section ofthe apparatus, saidsection being taken on line 3 3 in Fig. 1 looking in an upwarddirection, several portions of the apparatus being represented as beingbroken away. Fig. 4 is a rear view of theapparatus with the back oftheinclosingcasing removed, the said view representing one generalarrangement of operating-cocks by means of which the flow of gas to thevarious burners can be shut 0d, and a controlling-bellows by means ofwhich these cocks are controlled being omitted in this View. Fig. 5 is arear view of a portion of the framework of the apparatus, illustratingthe general arrangement of the bellows before it is blown up and thegas-conveying pipes and normally open cocks, which are-to be closed bythe upward movement of the said bellows when thesame has been expandedby forcing air from the lungs of a person into the Fig. 6 is a similarView of the same parts which are represented in said Fig. 5, showing thebellows in its partially blown up and raised position, havingclosed;"some of the gas-cocks during its upward movement. Fig. 7 is avertical representation of the bellows, taken on line 7 7 in Fig.5 ofthe drawings, just before the bellows has resumed its initial andnormally inoperative position, with a valve-controlling lever raised topermit the escapeof the air from the bellows during its descent after aperson has-ceased to blow air into said bellows. Fig. 8 is a horizontalsection of the lower portion of the apparatus, said section being takenon line 8 8 in Fig. 1 when looking in the direction of the arrow 'y insaid figure. Fig. 9 is a diagrammatical representation of one of the gasburners or jets, the same being represented in vertical section, one ofthe gas-cocks, the same being represented in horizontal section andclosed, and the pipe connections between the said burner and gas-cock.Fig. is a rear face view, on an enlarged scale, of a part of the bellowsframe or head, the gasconveying pipe, and some of the gas-cocksconnected with said pipe to illustrate more clearly the manner ofactuating the conical valveplugs of the several gas-cocks. Fig. 11 is atop view of some of the parts represented in said Fig. 10 with the mainportion of the bellows frame or head omitted, and Fig. 12 is a face viewlooking in the direction of the arrow in Fig. 11 of a bracket providedwith zigzag ribs for actuating certain crank-arms connected with theconical valve-plugs of the gas-cocks. Fig. 13 is a top or plan view, onan enlarged scale, of the bellows frame or head and a valve-controllingmechanism connected therewith. Fig. 14 is a side view of the said partslooking in the direction of the arrow 2 in said Fig. 13, and Fig. 15 isa similar view of the same parts looking in the direction of the arrowto in said Fig. 13. Fig. 16 is a vertical cross-section, taken on line16 16 in said Fig. 13, illustrating the several exposed to view.

parts of the mechanism in their normally inactive positions; and Fig. 17is a similar view of the same mechanism, representing the the partsthereof in their operated positions. Fig. 18 is a verticalcross-section, taken on line 18 18 in said Fig. 13, looking in thedirection of the arrow'o; and Fig. 19 is a side view of the mechanismsimilar to Fig. 14, but representing the parts of the mechanism in theiroperative positions.

Similar characters of reference are employed in all of the saidabove-described views to indicate corresponding parts.

The apparatus consists, essentially, of a suitable box or casing 1,which can be ornamented as desired and is of the general shapeindicated, although it will be clearly understood that the shape of thecasing and its ornamentation may be varied whenever found necessary. Inthe present form of casing the samecom'prises a suitable base 2 of ageneral rectangular configuration, four stand: ards or posts 3 at ornear the respective corners of the base, and a suitable top 4, securedupon the upper ends of the said standards or posts.3. The front of thesaid casing comprises a solid piece 5, suitably secured between thelower portions of the two front standards or posts 3, and directly abovethe said solid piece 5 and suitablysecured between the said posts 3 isframe 6, which is provided with a glass 7, through which the gasjets andthe force-indicating scale are fully As will be seen from aninspectionof Figs.- 3 and 8, the space between locked to the other rearpost 3 by means of a staple and pin 10, as clearly represented in Fig. 3of the drawings. When the said shell 8 is in its closed position, thenits upper edge fits against a rearwardly-extending part 11 of the top 4of the casing 1, while its lower edge s simply fitted against acorrespondinglyformed rearwardly-extending part 12 of the base 2. Thetwo sides of the apparatus are indicated by the reference-numbers 13,the sides being removably secured between the posts 3 by means of thefixed lugs 14 and the pivotally-arranged holding-catches 15, as clearlyillustrated in Fig. 8.

A represented in Fig. 2 of the drawings, the top 4 of the casing or box1 is formed with a suitable opening 16, preferably of the shape shown, ascreen or netting 17 being secured above the said opening 16 by means ofaframe 18, which is secured to said cover 2 with screws 19. The purposeof this opening in the cover 2 is to provide for the proper ventilationand the escape of the heat from the various gas-burners within the saidcasing. The screen or netting also serves as a covering for the openpart of top 2 of the casing to prevent the tampering with the lightedgas jets or burners. These gas jets or burners, of which there may beany desired number, are usually arranged on a semicircular platform 20,the platform being preferably formed with the steps 21, which arearranged in the present case in such a manner that the central gas jetor burner will be the highest and those at the extreme opposite ends ofthe said platform will be the lowest. Usually I employ eleven gas jetsor burners and the suitable connections for the same, and upon theconvex front of the said platform I have arranged a numbered index 22,the numbers thereon be ing placed opposite each step 21, provided withthe gas jets or burners 23, substan tially as illustrated in Fig. 1 ofthe drawings. The said platform 20, as will be seen from an inspectionof Fig. 3 of the drawings, is arranged upon a horizontal partition 24and directly in front of curved vertical wall or partition 25, which maybe polished metal or a mirror, whereby the general appearance of theapparatus is greatly enhanced. As will be seen from Figs. 3, 4, and 8,the rear edge of the said horizontal partition 24 is cut out, so as toform the angularly-arranged edges 26, 27,and 28. Suitably securedagainst the middle edge 26 and extending from the base to the top of theapparatus is a vertical partition 29, which is provided with asuitablyformed opening 30, as shown, and extending from the base 2 ofthe apparatus to the two edge portions 27and 28 and suitably securedthereto are two short vertical partitions 31 and 32. From an inspectionmore especially of Fig. 9 it will be seen that each gas-burner 23consists, essentially, of an outer tube 33, which may be made torepresent a candle, as shown, the said tube having its lower end portionresting in a recess 34 in a step at its upper end with an opening 35.

21 of the platform 20 and being provided VVithin each outer tube 33 isan inner tube 36, the said tube 36 being provided in its upper end witha small gas-outlet 37 and its lower portion extending through an opening38 in the step 21. The extreme lower portion of each gas tube or pipe 36passes in a. downward direction through a suitable fitting 39, in whichthis portion of the tube or pipe 36 is secured by means of a set-screw40 or any other suitable fastening means. Each fitting 39 is formed withperforated ears 41 and is secured in position against the under surfaceof the horizontalpartition 24 by means of screws or pins 42, asrepresented in Fig. 8 of the drawings.

The main gas-supply to the various gasburners 23 consists, essentially,of a main gas tube or pipe 43, which is preferably a piece of flexibletubing, the end of which is attached within the casing of the apparatusto a fitting 44, connected with a vertical standpipe 45. The lowerclosed end of this pipe 45 is secured to a shelf 46, extending rearwardly from the vertical partition 29, as shown, and the upper end ofsaid stand-pipe 45 is closed by means of a cap 47, having a perforatedflange 48 and a screw 49 for securing the upper end of said stand-pipe45 against the back of the vertical partition 29. In one side of thesaid stand-pipe 45 are a number of tubular outlets 50, which correspondin number to the number of gas-burners 23 employed in the apparatus. Thesaid outlets 50 are each provided with a suitably-constructed gas-cock51 for controlling the supply of the illuminating-gas to a second set ofgas-outlets 52, with each of which is connected a gas-conveying pipe 53,connected by means of flexible tubing 54 or in anyother suitable mannerwith the extreme lower ends 55 of the respective gas pipes or tubes 36of gas-burners 23.

As clearly illustrated in Fig. 9, the standpipe 45, the several cocks51, and the respective outlets 50 and 52 are usually cast in oneintegral piece; but it will be understood that these several parts maybe separately made and then connected in the usual manner commonlyemployed in the art of gas-fitting.

As shown, the inner tubular or chambered portions 56 of the outlets 50and the inner tubular or chambered portions 57 of the outlets 52 are incommunication with a straight duct or passage-way 58 of the gas-cocks51, each cock being formed with a cone-shaped seat 59 andcorrespondingly-formed valve 60, which has a lateral duct 61 extendingthrough the same from side to side. Thus when the said lateral duct 61is in direct communication with the duct or passage-way of the cock 51 afull supply of gas flows through the respective pipes and connections,which when ignited burns with a large and bright flame at each burner23, as represented in Fig. 1 of the drawings. The cone-shaped valve isoperated, in the manner hereinafter more fully set forth, by means of acrank-arm 62. A pointed set-screw 63 may also be employed with eachoutlet 52, which can be set by means of a screw-driver, to regulate themain supply of gas which is to be ignited at each burner. In addition tothese several parts just described each gas-outlet 50 has an auxiliaryoutlet-pipe 63 and an adjusting set-screw 64, directly opposite theinner end of the pipe 63, which can be set to permit a minimum supply ofgas to passinto the pipes 63, connected with the respective cocks 51,and then pass through the ducts 64 into nipples or connections 65 in thepipes 53, as clearlyillustratedinFig.9of the drawings. In this mannerwhen the main supply of gas has been arrested through the closing of thecook 51, in the manner to be hereinafter fully described, the largeflame at the burner 23 is reduced by the minimum charge of gas stillflowing to the burner, owing to this arrangement of the parts 63, 64,and 65, and will burn with a small flame directly within and below theupper edge of the outer tube 33 of the burner, and to all appearancesthe gasflame has been entirely extinguished. As soon as the gas-cock 51has again been opened the maximum supply of gas is furnished at theburner and the gas will again burn with the larger flame, as indicatedin said Fig. 1 of the drawings.

Having thus described the general arrangement and construction of thegas-burners, the connecting-pipes, and the intermediatelyarrangedgas-cocks, I will now endeavorto set forth the arrangement andconstruction of the mechanism for successively closing and opening therespective gas-cocks when a person blows air from his or her lungs intoa bellows connected with the apparatus.

The bellows consists, essentially, of a bag 66, made of a suitablefabric, and the two heads 67 and 68. The said bellows 66 has its lowerhead 67 suitably secured upon the shelf 46, while its upper head 68 isprovided with bracket 69 and a bearing 70. This bearing 70 is placedabout a vertical tube 71, which is closed at the top and has its lowerand open end extending through the head 68into the interior of thebellows 66, as indicated in Figs. 5, 6, and 7. Thus when the bellows isexpanded the said upper head 68 moves vertically upon the said tube 71,as willbe clearly evident. The upper end 72 of the said tube, it will beunderstood, is of necessity closed, but is provided with a smallvent-hole 73. Extending from the one side of the said upper head 68 isan arm 74, which is provided with an eye 75, slidably fitted upon aguiderod 76, as clearly shown in Figs. 5 and 6, and 79 indicates aflexible connection which is attached at its lower end to a pivotedvalvelever 78 upon the said head 68, and has its other end portionpassing through suitablyarranged eyes 79, as shown, and provided with acounterbalance 80, which can be made to slide in a downward or upwarddirection upon a guide-rod 81 during the upward or downward movements ofthe upper head 68 of' the bellows. When the said bellows is at itslowest point and also during the upward movement of the said head 68, avalve-disk 82 on the under side of the said lever closes 'an air-duct 83in the said head 68. In the said upper head 68 there is another openingprovided with a normally open valve mechanism 84, which is pivotallyarranged in a bracket 85, as shown. The valve construction which iscontrolled by this mechan ism is not in itself new, and is therefore setforth merely in a general way. As has been stated, under normalconditions this valve mechanism is open, and when air is forced from themouth-tube 86 and the fitting 87 into the bellows this air will escapethrough thesaid open valve mechanism without raising the bellows.Connected with the said fitting 87 there is an outlet-tube 88 and a cock89 for drawing oif any condensation from the said bellows. When theapparatus is in use, this cock 89 is closed. To operate the valvemechanism 84, and thereby close the normally open valve thereof, Ihaveprovided the apparatus with a coin-chute 90, which leads from slot 91 inthe front of the apparatus to a point within the apparatus directly atthe side of a receiver 92. When a coin is deposited in the said slot 91,it passes down the said coin-chute 90 and is dropped upon a lever 93,pivoted upon a bracket 94, whereby this lever moves from itshorizontally-dotted position (indicated in Fig. 5) and the positionrepresented in Fig. 16 to the inclined'position dotted in outline inFig. 6 and also indicated in Fig. 17 of the drawings. At the same timethe weighted end 95 in the form of a downwardly-extending stud or finger98 (see Figs. 16 and 17) is raised sufficiently to permit aspring-actuated bar or plate 99, which is pivotally secured upon a pin100-in the bearing-posts 1.01, to assume the raised position indicatedin said Fig. 17.

' In the meantime the deposited coin will have passed from the lever 93in the receiver 92 into a proper receptacle ordinarily placed beneathsaid receiver.

v The hereinabove-mentioned bearing posts orbrackets 94 and 101 formparts of a suitable frame or plate 102, which is suitably secured uponthe bellows-head 68 by means of screws 103 or in any other suitablemanner. The said head 68 is made with an opening 104.,

in which is movably arranged the lower and closed endof a tube 105,provided on said I -closed end with a flexible washer or disk 106. Thesaid tube 105 is provided with an opening 107, and by means of a pin 108it is capable of a sliding motion within a tubular hub 109 of said frame102. The projecting and free ends of the said pin 108 also rest directlyupon the upper surface of the bar or plate 99, as clearly shown. Thus itwill be evident from an inspection of Fig. 16 that when the warddirection.

parts are in the positions indicated in said .figure an unobstructedair-passage is formed between the. bellows 66 and. the tube 105, and anyblowing into the mouthpiece of the tube 86 will have no effect upon thebellows. When, however, the lever 93 has been tilted by a depositedcoin, then the springactuated bar or plate 99 is released, and said baror plate 99 acts against the projecting ends of the said pin 108,thereby raising the pinin the slots 110 of the hub 109 and with said pinraising the said tube 105 and bringing the flexible washer or disk 106directly against the under surface of the frame or plate 102, as clearlyindicated in Fig. 17. The inlet or opening 107 into said tube 105 isthus closed. The air from the lungs of a person blowing into themouth-tube 86 is now imprisoned in the bag of the bellows, whereby thesame expands and the upper head 68 moves in an up- At one side of thesaid head is a bracket 96, which has a pair of zigzag ribs 97, asindicated in the dotted outline in said Figs. 5 and 6 or as representedin Figs. 10, 11, and 12, with which the crank-arms 62 of the cone-shapedvalves 60 of the several gascocks 51 are brought in sliding contact asthe head 68 of the bellows moves upwardly upon the tube 71 and by meansof which any number of gas-cocks can be closed during the upwardmovement of the upper head 68 of the bellows, according to the power ofthe air being forced into the bellows. The manner of opening and closingthe respective gas- During the upward movement of the bellowshead 68each crank-arm 62 is successively and slidably engaged by the zigzag rib97 at the left side of the bracket 96, whereby each cone-- shapedvalve-plug 60 is operated, the valves being actuated in succession fromthe lowest valve up to shut off the main flow of the gas at eachgas-cock, as will be clearly understood from an inspection of the partsas rep resented in said Fig. 10 of the drawings. During the downwardmovement of the said head 68 and the bracket 96 when the person hasceased blowing the crankarms 62 of the closed valves of the gas cocksare successively brought into sliding engagement with another zigzag rib97 at the right of the bracket,whereby the arms 62 are moved from theright toward the left, and each cone valve or plug of thepreviously-closed cock is again actuated to permit of the passage of afull supplyof the gas through the respective gas cocks.

When the person ceases to blow, then the tendof the closed gas-cocks 51,and the valves thereof are opened. A full supply of gas is then againadmitted to each burner 33, and the small flame at each burner is againrestored to its original size.

It will thus be seen that I have devised an operative machine fortesting the blowing capacity of the lungs of a person, the operation andconstruction of the parts being such that one or more gas-flames aresuccessively reduced to indicate the blowing power of a person and theflames at the respective gas-bu rners being automatically restored totheir original size as soon as the person ceases to blow into themouth-tube connected with the apparatus.

I am aware that many changes may be made in-the various arrangements ofthe devices, as well as in the arrangements and combinations of theparts thereof,without departing from the scope of this invention. HenceI do not limit my invention to the exact arrangements and combinationsof the devices and their parts as described in the accompanyingspecification and as illustrated in the drawings, nor do I confinemyself to the exact details of the construction of any of the saidparts.

Having thus described myinvention, what I claim is- 1. In an apparatusfor testing the volume of the air blown from the lungs of a person, thecombination, with a casing, of a series of gas-burners, gas-conveyingpipes leading to the said burners, a series of gas-cocks, a bellowsadapted to be expanded by forcing air into the same, and means forsuccessively closing the said gas-cocks during the ascent of the bellowsand opening the closed gascocks during the descent of the bellows,substantially as and for the purposes set forth.

2. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing, of a series ofgas-burners, a stand-pipe, means for conducting gas into saidstand-pipe, a series of gas-cocks connected with the said stand-pipe, agas-conveying pipe between each gas-cock and each gas-burner, and meansfor successively closing and opening the said gas-cocks, substantiallyas and for the purposes set forth.

3. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing, of a series ofgas-burners, a stand-pipe, a means for conducting gas into saidstand-pipe, a series of gas-cocks connected with the said stand-pipe, agas-conveying pipe between each gas-cock and each gas-burner, a bellowsadapted to be expanded by forcing air into the same, andmeans forsuccessively closing the said gascocks during the ascent of the bellows,and opening the closed gas-cocks during the descent of the bellows,substantially as and for the purposes set forth. a

In an apparatus for testing the volume of the air blown from the lungsof a person, the combination, with a casing, of a series of gas-burners,gas-conveying pipes leading to the said burners, a series of gas-cocks,an oscillating valvein each gas-cock provided with a forwardly-extendingarm,a bellows adapted to be expanded by forcing air into the same, andmeans for successively engaging the forwardly-extending arms and therebyactuating the valves of said gas-cocks, consisting, of a bracket havingribs adapted to engage with the said arms for closing or opening thesaid valves, substantially as and for the purposes set forth.

5. In an apparatus for testing the volume of the air blown from thelungs ofa person, the combination, with a casing, of a series ofgasburners, gas-conveying pipes leading to the said burners, astand-pipe, means for conducting gas into said stand-pipe, a series ofgas-cocks connected with said stand-pipe, a gas-conveying pipe betweeneach gas-cock and each gas-burner, an oscillating valve in each gas-cockprovided with a forwardly-extending arm, and means arranged andconstructed to successively engage the said arms, and actuate theoscillating valves of the gascocks, substantially as and for thepurposes set forth.

6. In an apparatus for testing the volume of the air blown from thelungs ofa person, the combination, with a casing, of a series ofgasburners, gas-conveying pipes leading to the said burners, astand-pipe, means for conducting gas into said stand-pipe, a series ofgas-cocks connected with said stand-pipe, a gas-conveying pipe betweeneach gas-cock and each gas-burner, an oscillating valve in each gas-cockprovided with a forwardly-extending arm,a bellows adapted to be expandedby forcing air into the same, and means for successively engaging theforwardly-extending arms and thereby actuating the valves of saidgas-cocks, consisting of a bracket having ribs adapted to engage withthe said arms for closing or opening the said valves, substantially asand for the purposes set forth.

7. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing, of a series ofgasburners, each burner comprising an inner gasburning tube and an outertube, gas-conveying pipes leading to the said inner gas-burning tubes, aseries of gas-cocks, each cock being provided with an oscillating valvefor admitting a full supply of gas to the inner gasburning tube, meansfor closing the said gascocks, and an auxiliary gas-tube connected withsaid gas-conveying pipes and leading around each gas cock for providingeach burner with a constant but limited supply of gas, substantially asand for the purposes set forth.

8. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing, of a series ofgasburners, each burner comprising an inner gas burning tube,gas-conveying pipes leading to the said inner gas-burning tubes, aseries of gas-cocks, each cock being provided with an oscillating valvefor admitting a full supply of gas to the inner gas-burning tube, meansfor closing the said gas-cocks, and an auxiliary gas-tube connected withsaid gas-con veying pipes and leading around each gas-cock for providingeach burner with a constant but limited supply of gas, and a bellowsadapted to be expanded by forcing air into the same, the said bellowsbeing arranged to actuate the said closing means of said gas-cocks, andsuccessively closing the valves of said cocks during the ascent of thebellows and opening said valves during the descent of the said bellows,substantially as and for the pn rposes set forth.

9. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing, of a series ofgas-burners, each burner comprising an inner gas-burning tube and anouter tube, a standpipe,means for conducting gas into said standpipe, aseries of gas-cocks connected with said stand-pipe, a gas-conveying pipebetween each gas-cock and each inner gas-burning tube, an oscillatingvalve in each gas-cock for admitting a full supply of gas to the innergasburning tube, means for closing the said gascocks, and auxiliarygas-tubes connected with the said stand-pipe and the said gas-pipeswhich lead to the said inner gas-burn ing tubes, the said auxiliarygas-tubes leading directly around the said gas-cocks, for providing eachburner with a constant but limited supply of gas, substantially as andfor the purposes set forth.

10. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing, of a series ofgas-burners, each burner comprising an inner gas-burnin g tube, a stand-pipe,means for conducting gas into said stand-pipe, a series ofgas-cocks connected with said stand-pipe, a gas-conveying pipe betweeneach gas-cock and each inner gas-burning tube, an oscillating valve ineach gas-cock for admittinga full supply of gas to the inner gas-burningtube, means for closing the said gas-cocks, and auxiliary gas-tubesconnected with the said standpipe and the said gas-pipes which lead tothe said inner gas-burning tubes, the said auxiliary gas-tubes leadingdirectly around the said gas-cocks, forproviding each burner with aconstant but limited supply of gas, and a bellows adapted to be expandedby forcing air into the same, the said bellows being arranged to actuatethe said closing means of said gas-cocks, and successively closing thevalves of said cocks during the ascent of the bellows and opening thesaid valves during the descent of the said bellows, substantially as andfor the purposes set forth.

11. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing of a bellows adaptedto be expanded, a series of gas-burners, and an intermediately-arrangedmechanism between said bellows and the burners for successively reducingthe gas-flames at the said burners, and then restoring said flames totheir original size, substantially as and for the purposes set forth.

12. In an apparatus for testing the volume of the air blown from thelungs of a person, the combination, with a casing, of a bellows adaptedto be expanded, a bracket on said bellows, provided with ribs, a seriesof gasburners, and gas-cocks arranged in gas-conveying pipes connectedwith said burners, and means on said gas-cocks with which said ribs onsaid bracket engage for closing and opening the said gas-cocks,substantially as and for the purposes set forth.

In testimony that I claim the invention set forth above I have hereuntoset my hand this 19th day of July, 1901.

MICHAEL BENEDICT.

Witnesses:

FREDK. O. FRAENTZEL, GEO. D. RICHARDS.

